@article{1077473250, author = {Hsiung, Chuan-Chih}, title = {A projective invariant of a certain pair of surfaces}, journal = {Duke Math. J.}, volume = {12}, number = {1}, year = {1945}, pages = { 441-443}, language = {en}, url = {http://dml.mathdoc.fr/item/1077473250} }
Hsiung, Chuan-Chih. A projective invariant of a certain pair of surfaces. Duke Math. J., Tome 12 (1945) no. 1, pp. 441-443. http://gdmltest.u-ga.fr/item/1077473250/